…ng as errors in VS

Set severity for IDE0005, IDE0008, IDE0016, IDE0018, IDE0019, IDE0021, IDE0022, IDE0023, IDE0025, IDE0027, IDE0028, IDE0029, IDE0031, IDE0032, IDE0034, IDE0036, IDE0039, IDE0042, IDE0044, IDE0045, IDE0046, IDE0047, IDE0057, IDE0051, IDE0052, IDE0054, IDE0055, IDE0056, IDE0057, IDE0059, IDE0060, IDE0061, IDE0063, IDE0071, IDE0073, IDE0074, IDE0075, IDE0077, IDE0078, IDE0083, IDE0090, IDE0100, IDE0130, IDE160, IDE180, IDE0200, IDE0240, IDE0250, IDE0251, IDE0260, IDE0270, IDE0290, IDE0300, IDE0301, IDE0305, IDE1005, IDE1006, CA1859, CA2022, CA2263

Made the following style rules `silent` instead of `suggestion`: 
- Use explicit type instead of 'var'
- Use expression body for ...
- Use block-scoped namespace

…of making exclusions for the few entries