Working IL

.method public hidebysig static string Redacted(string name, valuetype [mscorlib]System.DateTime lastModified) cil managed
{
    .maxstack 6
    .locals init (
        [0] int64 num,
        [1] int64 num2,
        [2] bool flag)
    L_0000: ldarga.s lastModified
    L_0002: call instance int64 [mscorlib]System.DateTime::get_Ticks()
    L_0007: stloc.0
    L_0008: ldloc.0
    L_0009: ldloc.0
    L_000a: ldc.i4 10000
    L_000f: conv.i8
    L_0010: rem
    L_0011: sub
    L_0012: stloc.1
    L_0013: ldloc.0
    L_0014: ldloc.1
    L_0015: ceq
    L_0017: stloc.2
    L_0018: ldloca.s flag
    L_001a: call instance string [mscorlib]System.Boolean::ToString()
    L_001f: call void [Redacted]Redacted.Log::Debug(string)
    L_0024: ldloc.0
    L_0025: ldloc.0
    L_0026: ldloc.0
    L_0027: ldc.i4 10000
    L_002c: conv.i8
    L_002d: rem
    L_002e: sub
    L_002f: beq.s L_007e
    L_0031: ldarg.1
    L_0032: ldsfld valuetype [mscorlib]System.DateTime [mscorlib]System.DateTime::MaxValue
    L_0037: call bool [mscorlib]System.DateTime::op_Inequality(valuetype [mscorlib]System.DateTime, valuetype [mscorlib]System.DateTime)
    L_003c: brfalse.s L_007e
    L_003e: ldstr "Last Modified Date = \'{0}\'. Ticks = \'{1}\'. TicksCalc = \'{2}\'"
    L_0043: ldarga.s lastModified
    L_0045: ldstr "dd/MM/yyyy hh:mm:ss.fff"
    L_004a: call instance string [mscorlib]System.DateTime::ToString(string)
    L_004f: ldloc.0
    L_0050: box int64
    L_0055: ldloc.0
    L_0056: ldloc.0
    L_0057: ldc.i4 10000
    L_005c: conv.i8
    L_005d: rem
    L_005e: sub
    L_005f: box int64
    L_0064: call string [mscorlib]System.String::Format(string, object, object, object)
    L_0069: call void [Redacted]Redacted.Log::Debug(string)
    L_006e: ldstr "lastModified specifies too accurate a date"
    L_0073: ldstr "lastModified"
    L_0078: newobj instance void [mscorlib]System.ArgumentException::.ctor(string, string)
    L_007d: throw
    L_007e: ldarga.s lastModified
    L_0080: call instance valuetype [mscorlib]System.DateTimeKind [mscorlib]System.DateTime::get_Kind()
    L_0085: ldc.i4.1
    L_0086: beq.s L_00a5
    L_0088: ldarg.1
    L_0089: ldsfld valuetype [mscorlib]System.DateTime [mscorlib]System.DateTime::MaxValue
    L_008e: call bool [mscorlib]System.DateTime::op_Inequality(valuetype [mscorlib]System.DateTime, valuetype [mscorlib]System.DateTime)
    L_0093: brfalse.s L_00a5
    L_0095: ldstr "lastModified should be in UTC"
    L_009a: ldstr "lastModified"
    L_009f: newobj instance void [mscorlib]System.ArgumentException::.ctor(string, string)
    L_00a4: throw
    L_00a5: ldstr "{0}{1}"
    L_00aa: ldarg.0
    L_00ab: ldarg.1
    L_00ac: call string Redacted::Redacted(valuetype [mscorlib]System.DateTime)
    L_00b1: call string [mscorlib]System.String::Format(string, object, object)
    L_00b6: ret
}